Multiple vulnerabilities in IBM Flex System Chassis Management Module (CMM)



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2018-15473
CVE-2018-15919
CWE-ID CWE-388
CWE-200
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Flex System Chassis Management Module (CMM)
Hardware solutions / Other hardware appliances

Vendor IBM Corporation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) User enumeration

EUVDB-ID: #VU14440

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2018-15473

CWE-ID: CWE-388 - Error Handling

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to enumerate all accounts on the system.

The vulnerability exists due to a logical error in auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c files when processing authentication requests. A remote attacker can send a specially crafted chain of packets and monitor behavior of openssh server to determine presence of a valid username. The server will drop connection upon receiving a malformed authentication packets if the username is valid.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Flex System Chassis Management Module (CMM): before 2pet18a-2.5.14a

CPE2.3 External links

https://www.ibm.com/support/pages/node/870680


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.

2) Information disclosure

EUVDB-ID: #VU14548

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-15919

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to insufficient validation of an authentication request packet when the Guide Star Server II (GSS2) component is used. A remote attacker can send an authentication request packet and access sensitive information, such as valid usernames.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Flex System Chassis Management Module (CMM): before 2pet18a-2.5.14a

CPE2.3 External links

https://www.ibm.com/support/pages/node/870680


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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